A random sample of 20 daily workers of State A was found to have average daily earning of dollar 44 with sample variance 900. Another sample of 20 daily workers from State B was found to earn on an average dollar 30 per day with sample variance 400. Test whether the workers in State A are earning more than those in State B.
Q: 2) Random sample of 11 male high school students and 12 female high school students are selected…
A: Males : N1 = 11 df1 = 11 - 1 = 10 Mean ( M1 = 560 ) Standard deviation ( S1 = 133.1) Females :…
Q: A national nursing organization is lobbying congress for sunding to hire more nurses nationwide. One…
A: Here sample size n=9
Q: Suppose that the average waiting time for a patient at a physician's office is just over 29 minutes.…
A:
Q: A marketing manager for a popular supermarket chain is investigating how the position of a new…
A: Here given that, sample size is n= 26 And total groups are k= 4 So d.f. between groups= k-1= 4-1= 3…
Q: A researcher was interested in knowing if inspirational messages from professors would make a…
A:
Q: Looking for a birthday cake, you checked the cake prices on three different stores - Red Ribbon,…
A: Three cake shops : Red ribbon, Vizco's and Tea house Here shortlisted : vizco's Different flavors:…
Q: What would be the sample variance and standard deviation for a sample of 8 observations with the…
A: The sample variance is the average of the squared deviations of the observations from their mean.…
Q: (a) State the hypotheses and identify the claim. H " not claim H claim This hypothesis test is a…
A: As per our guidelines, we are allowed to answer first three sub-parts only. Thanks Population…
Q: Assume that matched pairs of data from a poll of Internet users who were asked if they make travel…
A: Assume that matched pairs of data from a poll of Internet users who were asked if they make travel…
Q: minutes) for a sample of patients at offices that do not have a wait-tracking system and wait times…
A:
Q: A manufacturer is testing its new grain moisture meter and sampled out 5 grain types (1, 2, 3, 4, 5)…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…
Q: Next, let's imagine that you want to examine whether the pattern of frequencies across the political…
A: We want to find the value of Pearson's Chi- square test from the above given problem ?
Q: A study of all 2093 employees of a company shows that 54% are satisfied with the company's health…
A: Definition Statistic: Statistic may be defined as which one is based on the sample Parameter:…
Q: Students in an English course center were divided into 4 groups and took courses from different…
A: Given information: Number of groups is 4. Level of significance is 0.1. The following information is…
Q: Sample mean Error Sample variance Plant 1 Plant 2 Plant 3 Atlanta Dallas Seattle 85 10 M₂ M₂ M₂ M₂…
A: Given information:k= 3 groups or treatments Each group has 6 observation
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A: (a). Compute the sample test statistic: Null and alternate hypotheses: The investigator is…
Q: The article “Facebook Use and Academic Performance Among College Students” estimated that 87% of…
A:
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A: We have given that Sample size n1= 44 , n2= 52 Sample mean xbar1 = 4.9 , xbar2 = 5.7 Known standard…
Q: A survey of 1200 TV households showed that 53.5% of them had at least one stand-alone streaming…
A: Let p be the population proportion p=majority=1/2=0.50=50%, n=1200, p^=sample…
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A:
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A: The level of significance is 0.05.
Q: An airline is trying two new boarding procedures, Option 1 and Option 2, to load passengers onto…
A: Solution: Given information: Option 1 sample statistic are n1= 265 x1 = 17.6 s1= 4.7Option 2 sample…
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A: Given: n1 = 47 X1 = 4.9 σ1 = 1.2 n2 = 43 X2 = 5.5 σ2 = 1.4 α = 0.05 Formula Used: Test-statistic Z =…
Q: 5) According to the Center for Disease Control, 60.9% of college students nationwide are fully…
A: Given information: According to the Center for Disease Control, 60.9% of college students nationwide…
Q: ative signs, and 29 ties when the value of the second variable is subtracted from the corresponding…
A: Given: There are 317 positive results from the matched pairs of data from a survey of internet users…
Q: Imagine that a researcher hypothesizes that early TV viewing influences Freshman Composition grades…
A: Given, Number of children who watch show=n1=10 Number of children who do not watch show=n2=10 Mean…
Q: t is traditionally believed in the literature on bird migration that godwits that migrate between…
A: Given information, A study of godwits are now traveling a shorter mean distance non-stop is…
Q: students. Use a significance level of 5%. What is the alternative hypothesis? Group of answer…
A: The given data is A researcher wants to examine different online teaching environments by collecting…
Q: Insurance companies track life expectancy information to assist in determining the cost of life…
A: Note: Hi! Thank you for the question, As per the honor code, we are allowed to answer three…
Q: The bad debt ratio for a financial institution is defined to be the dollar value of loans defaulted…
A: The data of mean bad debt ratio of 65 banks are given and objective is to test whether the mean bad…
Q: Attention-deficit/hyperactivity disorder (ADHD) is a brain disorder that results in recurring…
A: Age is a discrete value which means the range of age is going to be a discrete value which cannot be…
Q: Sketch the sampling distribution and show the area corresponding to the P-value. b a -2 -1 O-3 -2 -1…
A:
Q: If the owner of a gasoline station wants to study gasoline purchasing habits by motorists at his…
A:
Q: IN a random sample of males, it was found that 27 write their left hands and 207 do not. In a random…
A: The hypothesis is, Null hypothesis: H0:p1-p2≥0 Alternative hypothesis: H1:p1-p2<0 The sample…
Q: The manager of computer operations of a large company wishes to study computer usage of two…
A: (a) That is, there is no evidence to conclude that there is a difference in the mean processing…
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A: a) The level of significance is 0.05.
Q: Following an oil spill, a particular region of the ocean is being tested for the level of a chemical…
A: We have given the following information about a particular region of the ocean is being tested…
Q: The data "sea_pets_samp" is a simple random sample of 100 cases from the dataset "seattlepets" from…
A:
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A: Given information- Significance level, α = 0.05 We have given two samples- For sample 1- Sample…
Q: A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point…
A:
Step by step
Solved in 3 steps with 3 images
- Without external cues such as the sun, people attempting to walk in a straight line tend to walk in circles. It has been suggested that this tendency is due to internal asymmetries between individuals, or that individuals' legs differ in length or strength. Souman et al. (2009) tested for differences in individuals' tendencies to change direction by blindfolding 15 participants and asking them to walk in a straight line in an empty field. The numbers in this dataset represent median change in direction (or turning angle) of each of the 15 participants, measured in degrees per second. Negative angles = left turns; positive angles = right turns.Begin by producing a frequency distribution graph of the dataset for yourself. Do the data appear to be normally distributed? Answer "yes" or "no" Which direction are people more likely to turn in based on your graph? Answer "right" or "left" Is this a 1- or a 2- tailed t-test? (enter either "1" or "2" for your answer) Conduct a…An amusement park conducted an internal audit on the wait times of its customers for the park's rides during a summer weekend. The audit found that the wait times of customers for the Shooting Star ride had a population mean of 31.2 minutes with a population variance of 6.3 minutes The park's head executive has doubts about the audit's findings concerning the Shooting Star ride. He hires an inspector to check these findings. On a summer weekend, the inspector takes a sample of 12 people at random waiting in line for the Shooting Star. She records their wait times and finds that the sample mean is 33.1 minutes and the sample variance is 4.8 minutes 2 Fill in the blanks below with the proper notation for the population mean, the population variance, and the sample variance. 66°F Cloudy Population mean: (Choose one) = 31.2 minutes X Population variance: (Choose one) = 6.3 minutes 2 Sample variance: (Choose one) 2 = 4.8 minutes Continue 3 W E 5. D DIL R Q Search 5 G 7 G Y U H 8 X C V B N M…A researcher wants to examine different online teaching environments by collecting data on 20 students. Half of the students had synchronous class while the other half had asynchronous class. For the students who had the synchronous class, they scored an average of 80 on the final exam with a sample variance of 10. For the students who had the asynchronous class, they scored an average of 78 on the final exam with a sample variance of 18. Determine if there is a significant difference between the average final exam score between the two groups of students. Use a significance level of 5%. What is the null hypothesis? Group of answer choices: A.) The average final exam score for the asynchronous class is higher than the synchronous class. B.) There is a difference in the average final exam score between the asynchronous class and synchronous class. C.) The average final exam score for the asynchronous class is lower than the synchronous class. D.) There is no difference in the…
- 23. A. ANOVA determines the significance of relationships between the variables. B. Variance caused by pre-existing individual differences between the subjects will result in a significant F-value. a. Ais True, B is False b. A is False, B is True c. A and B are True d. A and B are FalseA Michigan study concerning preference for outdoor activities used a questionnaire with a six-point Likert-type response in which 1 designated "not important" and 6 designated "extremely important." A random sample of n1 = 44 adults were asked about fishing as an outdoor activity. The mean response was x1 = 4.9. Another random sample of n2 = 49 adults were asked about camping as an outdoor activity. For this group, the mean response was x2 = 4.1. From previous studies, it is known that ?1 = 1.5 and ?2 = 2.0. Does this indicate a difference (either way) regarding preference for camping versus preference for fishing as an outdoor activity? Use a 5% level of significance. Note: A Likert scale usually has to do with approval of or agreement with a statement in a questionnaire. For example, respondents are asked to indicate whether they "strongly agree," "agree," "disagree," or "strongly disagree" with the statement.Consider the two sample t-test with equal variances and the paired t-test. These tests are equivalent to which experimental designs. State the designs and draw detailed comparison between them.
- Another idea is to look at how a team's payroll impacts its home attendance. Higher payroll usually signals more higher-skilled players on a roster which should brings fans to the ballpark to see these players. Create 2 samples based on Team Salary and calculate average attendance, variance of attendance, and standard deviation of attendance for each sample. Sample 1 = 10 teams with the highest team salary Sample 2 = 10 teams with the lowest team salary Tip: Use Excel's sorting tool to sort the data by salary (highest to lowest), and copy the 10 highest and 10 lowest into a separate part of the spreadsheet for easier analysis. Sample 1 Sample 2 Top 10 Team Salary Bottom 10 Team Salary Sample mean attendance mil mil Sample attendance variance mil mil Sample attendance standard deviation mil mil Perform a hypothesis test to determine whether there is a difference in the mean attendance of teams between the two groups…In a comparison between the mean waiting time of the patients in the hospitals of Giza and Alexandria governments the minister of Health randomly selected 60 hospitals from Giza government and their mean waiting time was 30 minutes and the previous reports showed that the variance was 10 minutes. Also a sample consist of 50 hospitals from Alexandria governments was selected and their mean waiting time of this sample was 15 minutes and from previous reports the variance was 5 minutes. 1-Construct the 95% C.I for the difference between the average waiting time in Giza & Alex2- Without any computations, discuss fully and precisely what will happen to the results you obtained in part (1) if the confidence level changed to be 99% instead of 95%. Give the reason for your answer2. A principal of high school was concerned with amount of time her students devote to working at after-school jobs. She randomly selected 25 students, obtained their working hours for 1 week and computed x = 12.5 hours and s = 4.5 hours. She claims that her students work significantly more than the mean of 10.7 hours from a study conducted by the National Association of State High School Association. Test her claim by using the 5% level of significance.
- A Michigan study concerning preference for outdoor activities used a questionnaire with a six-point Likert-type response in which 1 designated "not important" and 6 designated "extremely important." A random sample of n1 = 41 adults were asked about fishing as an outdoor activity. The mean response was x1 = 4.9. Another random sample of n2 = 50 adults were asked about camping as an outdoor activity. For this group, the mean response was x2 = 5.7. From previous studies, it is known that ?1 = 1.6 and ?2 = 1.5. Does this indicate a difference (either way) regarding preference for camping versus preference for fishing as an outdoor activity? Use a 5% level of significance.Note: A Likert scale usually has to do with approval of or agreement with a statement in a questionnaire. For example, respondents are asked to indicate whether they "strongly agree," "agree," "disagree," or "strongly disagree" with the statement. (a) What is the level of significance? .05 State the null and alternate…There are two samples. One is a group of 8 athletes who practice and the other is a group of 5 athletes who do not practice. The mean for group 1 is 92.4 and the standard deviation is 5.83. For group 2, the mean is 81.3 and the standard deviation 7.85. the coach thinks the true mean for the athletes who did not practice is more that 8 points smaller than those who did practice. a) make the null and alternative hypotheses. calculate the test statistic and give an explanation as to why you chose this test statistic.A significant result in an ANOVA indicates that A)the means of two groups are different, B)there is a significant effect of random variance. C)there is a significant effect of systematic variance. D)the intercept of the regression line is not zero.